.page-container {
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: column;
}

.lineprogress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  background-color: white;
}

.chat-container {
  display: flex;
  flex-direction: column; 
  margin-top: 20px;
  width: 100%;
  height: calc(100% - 20px);
  flex-direction: column;
  
}

.chat-messages {
  overflow-y: auto;
  padding: 10px;
  flex: 1;
}

.message {
  display: flex;
  flex-direction: column; 
  max-width: 80%;
  margin: 4rpx 0;
  border-radius: 15rpx;
  word-wrap: break-word;
  width: fit-content;
}

.message.system {
  margin-right: auto;
  background-color: #306fbb;
  color: #fff;
  padding: 10rpx 20rpx;
  margin-top: 10rpx;
  text-align: left;
  align-self: flex-start;

}

.message.user {
  margin-right: 2vw;
  margin-left: auto;
  background-color: rgba(194, 191, 191, 0.494);
  color: #000;
  padding: 10rpx 20rpx;
  margin-top: 10rpx;
  text-align: right;
  align-self: flex-end;
}

.input-container,
.picker-container,
.options-container {
  display: flex;
  padding: 10px;
  background-color: #fff;
  border-top: 1px solid #ccc;
  width: 100%;
}

.van-picker {
  width: 70vw; /* 加宽 picker 的宽度 */
  padding: 20px;
}

.van-picker-column {
  margin-right: 30px; /* 加大两列之间的间距 */
}